The company said in a statement they are taking "aggressive steps" to end the outbreak. The company closed 43 restaurants in Oregon and Washington in late October. Those restaurants have since been reopened.

"The source of the problem appears to have been contained during a period in late October," the company statement read. "In response to this incident, Chipotle has taken aggressive steps to make sure its restaurants are as safe as possible. There have been no reported new cases in Washington or Oregon since Chipotle put its remediation plan into effect."